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Post by vasko on May 6, 2019 9:34:06 GMT
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Post by hoppy on May 6, 2019 12:24:38 GMT
I can't see it reducing drag much compared with a fixed prop.
It will be crazily expensive and will probably give less benefits to even a cruiser than a folder or feather.
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Post by vasko on May 6, 2019 12:40:47 GMT
I can't see it reducing drag much compared with a fixed prop. It will be crazily expensive and will probably give less benefits to even a cruiser than a folder or feather. The math behind the prop is good - for me the price is very interesting if in the area of standard fix prop will have good future... |
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Post by hoppy on May 7, 2019 12:14:40 GMT
I can't see it reducing drag much compared with a fixed prop. It will be crazily expensive and will probably give less benefits to even a cruiser than a folder or feather. The math behind the prop is good - for me the price is very interesting if in the area of standard fix prop will have good future... If it is such an advancement in prop design, they would be crazy to not offer it at a significant premium over standard fixed props. |
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Post by MalcolmP on May 9, 2019 15:30:39 GMT
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Post by Trevor on May 9, 2019 23:17:29 GMT
ah yes, wait for the patent to expire and reinvent it.....
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Post by tilo on May 11, 2019 14:01:08 GMT
Definitely interesting, and it's a truism that regular props are less than perfect, but we need more data. The projected area might well be the same as a traditional prop, so drag would be about the same. My biggest concern would be fouling.
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Post by vasko on May 11, 2019 15:27:11 GMT
Good find  the new design looks now like more the a marketing trick... like the ultrasonic antofoiling... |
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Post by MartyB on May 12, 2019 15:20:20 GMT
I do not personally see a benefit per say to those sailing. A BIG ship, military or equal, or a all the time powered boat would could see a benefit. I do not see this being a good or bad thing from a sailboat stand point as noted.
My 02 on this. I could be wrong!
Marty
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Post by hoppy on May 13, 2019 0:00:50 GMT
I would imagine that the greatest benefit of this prop design will be for boats that have propellers that have high tip speeds and cavitation.
For sailors, the benefit will be with the outboard on their dinghys, at least those that are capable of getting on the plane.
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Post by sitara on May 13, 2019 2:10:07 GMT
The high aspect ratio of the "blades" could contribute to increased efficiency compared to the normal blade design assuming water flow somewhat matches air flow over wings/sails.
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Post by zzmeyer on May 13, 2019 3:08:23 GMT
Will be interesting to see. Propeller technology, in general, is one of the most researched technologies. Yachtworld did a great comparison of props a few years ago. It is amazing how different the performance was among them. The thrust difference between the best and worst was much greater than 15%. They tested reverse as well as forward thrust, both will be important in a marine environment as well as prop walk, another issue.
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the new design looks now like more the a marketing trick... like the ultrasonic antofoiling...
